This was obviously WAY past the finish line and not a case of excessive braking. I've had opponents hit reverse by accident in the shutdown area more than once. (once in eliminations, once in a qualifying run) On the elimination run, I got beat fair and square. I didn't complain, and my opponent busted his ***** to swap transmissions between rounds and continued on in eliminations, albeit on some slightly less than perfectly round tires.
A little common sense goes a long way.